[Private]
Because they were transformed. [A stain, a rather dark one on their history. It isn't a pleasant conversation.] Hundreds upon thousands of innocent lives were destroyed, all just because of the actions of a few.
[Only it's worse than that]
Those people... they didn't want to fight or find themselves the servant of a vampire. But no matter how much they desired freedom, they didn't have a choice. [It was worse than death, and only led to insanity and madness.] Don't you think... all those people searched for ways to reverse the affect and hold?
[Or maybe she needs to give him an example a little closer to home, voice softening; sadly]
Don't you think that Zero, of all people, would have come forward with an answer if he thought it was possible?